describe StatusCat::Checkers::DelayedJob do

  let(:checker) { StatusCat::Checkers::DelayedJob.new.freeze }

  it_should_behave_like 'a status checker'

  it 'tolerates the gem missing' do
    gem = Object.send(:remove_const, :Delayed)
    expect(checker.status).to eql('delayed_job gem is not installed')
    Object.const_set(:Delayed, gem)
  end

  it 'fails if there is an exception' do
    expect(ActiveRecord::Base.connection).to receive(:execute).and_raise(:error)
    expect(checker.status).to_not be_nil
  end

  it 'fails if there are expired jobs' do
    expect(ActiveRecord::Base.connection).to receive(:execute).and_return([1], [1])
    expect(checker.status).to_not be_nil
  end

  it 'passes if there are no expired jobs' do
    expect(ActiveRecord::Base.connection).to receive(:execute).and_return([1], [0])
    expect(checker.status).to be_nil
  end

  it 'uses the job count as the value' do
    expect(ActiveRecord::Base.connection).to receive(:execute).and_return([1], [0])
    expect(checker.value).to eql(1)
  end
end